Gets resources residing on an eXist server.
Resources are specified by the relative or absolute path. If a collection is specified then the collection description is returned as defined by the GET method in http://exist.sourceforge.net/devguide_rest.html

In the one argument case the resource is retrieved and output to the standard output.
In the two argument case the resource is retrieved and stored to the named file or port.
In the three or more argument case multiple resources are retrieved and stored in the output directory named by the basename of the resource.